Lifting-jack.



No. 786,706. PATENTBD APR. 4;, 1905. E. WUSTNER. LIFTING JACK.

APPLIOATIOI. FILED OCT. 20, 1904.

2 SHEETSSHBET l.

No. 786,706. PATENTED APR, 4, 1.905.

E. WUSTNEE. LIFTING JACK.

APPLICATION FILED 001". 20, 1904.

2 SEEBTS-SHBET Z.

its. reeves.

' Patented April e, 1on5.

ERNEST WUSTNEE,

OF PHILADELPHTA, PENNSYLVANIA, ASSlONOR TO GLOBE JACK COMPANY, OF PHiLADELPl-HA, PENNSYLVANIA.

LEFTlNG dAQK:

SEECIFICATIGN forming part of Letters Patent No. 786,706, dated. April Application filed October 20, 1904. Serial No: 229,291.

To (LZZ whom it may concern:

Be it known that I, ERNEST VVUSTNER, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Lifting-Jacks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention is an improved lifting-jack; and it consists in the construction, combination, and arrangement of devices hereinafter described and claimed.

One object of my invention is to effect improvements in the construction of the wormgear which meshes with the rack-teeth of the Vertically-movable bar.

A further object of my invention is to effect improvements in the construction of the standard which carries the vertically-movable rack-bar and which forms a casing to inclose the worm-gear and provides bearings for the journals thereof.

A further object of my invention is to effect improvements in the means for rotating the worm-gear by a step-by-step movement in either direction to raise or lower the vertically-movable bar.

in the accompanying drawings, Figure l is a vertical central sectional view of a liftingjacl: embodying my improvements, the vertically-movable bar being shown in elevation and the worm-gear being shown in section. Fig. 2 is a transverse sectional view of the same, taken on the plane indicated by the line a a of Fig. 1 and omitting the lever. Fig. 3 is a detail view showing a portion of the toothed face of the vertically-movable bar in elevation and the volute or worm flange of the gear which engages the said toothed bar, in section, and Fig. i is a plan view of the face of the worm-gear.

The standard 1 of my improved liftingack is made of a pair of separable sections 2, each of which is a single casting, and eomprises a shank portion 3, having a groove at on its inner side, a foot portion 5, and a semicircular casing portion 6 on one side near its tion being laterally inclined and lying obliquely with reference to the shank, the upper side of the interior portion of the casing merging into and communicating with the groove One flange, 7, of each standard section is formed at its lower end with a web 8, which extends outward nearly to one end of the foot, the said flange being also formed with a web portion 9, which extends to the lower inner side of the semicircular casing portion 6. The opposite flange, 10, of each section has a vertical opening 11; which extends for a suitable distance from its lower end to form a clearance-slot, in which the lower lift 12 of the vertically-movable bar 13 operates, as hereinafter described. The said flange 10 is formed at its lower end with a reinforcingweb l i. Between the opposing sides of the said webs 14 of the respective sections is formed an opening 15, which communicates with the lower end of the guide-slot formed by the openings 11 and enables the lower lift 12 to lie therein when the vertically-movable bar is at the lowest lim t of its movement. The said sections of the standard are secured together by bolts, rivets, or other suitable devices, as at 16.

The vertically-move. le lift-bar is provided on its front side with rack-teeth 17, each of which is curved from end to end, as shown in Fig. 3. The said vertically-movable bar is formed at its upper end with a head 18, recessed onits upper side, as at 19, to adapt it to lit against the under side of an axle orother object.

In the circular casing of the standard is mounted a worm-gear 20. Said worm-gear has a frusto-conical inner face 21, on which is a volute or worm flange 22, which is flared outwardly, so that its outer face 23 is substantially perpendicular to the conical inner face of the gear. The radius of this volute or worm flange is substantially equal to that of the inner or lower faces of the teeth of the vertically-movable bar, and the construction of the outer face 23 of the volute or worm l. flange, which is substantially perpendicular l to the conical face of the gear, adapts the upper end, the said semicircular casing porvertically-n1ovzble bar in succes'ion outer side of the said volutc or worn: flange 'allel. with and snirgl; rangan'e the under opposing sides of the teeth of the rack or as the bar is raised or lowered by the re on of the said worm-gear. The latter formed or provided 0n inner side at its center with a jour" na 25, which engages a b airing 538, that is formed at the inner sides ol' the members of the circular mounted, and the latter is formed or provided on its outer side with a fonrnal 2'7, which turns in a bearing 28 which is termed in the outer sides ol the members ol the said circular casing. The said outer join-rial 2'? projects to a suitable disanee from the outer side of the worm-gear and is provided witl a eresspin 29. The one 'ating-lever 30 has a hub or sleeve ill at its inner end, which ada ted to iit on the said outer projeci'aing' journal oi the wornrgear and to turn thereon and is provided in opposite ends with notches 32 to engage the res )ecti\ 'e ends of the said cross-pin and with reversely curved cams 2-53, which serve by the partial rotary movement of the said lever lire; in one direction and then in the other direction to cause the ends ol the cross-pin to be alternately engaged and disengaged by the .Jaid notches so that the said worn'i-gear by thus operating lhe said lever may be rotated by a ste -by-stop movement to raise or lower the vertically-niovable bar. The 2 Jill-S ol the worm-gear is i nclined, as shown in El ie. ii to bring the upper portion of the frusiio-conical laee thereof into tion with the opposing side oi the verticallyrnovable rack-bar and use the volnte or worm 'lian 'e ol the gear to closely engage the teeth oi sanl raclrdmr.

wing thus described my invention, what I cla l mu pm ini as new, and d esire to secure by Letters intent, 1c

i. la a lifting-jack,

the combination of a rerti :ally-niovableba havingrack-teeth, each of which is curved from end to end transversely ol said rack-bar, guiding and supporting cienient for the i ar a worm-p; ar havcasing in which the worm-gear parallel reiaing its hearings in saic guiding; and supporting; clement, said worm-gear being; provided with a 'filiStO-COfiiCitl inner in e opposed to the toothed face of the rack-bar and having a velute or worm flange on said frusto-eonieal lace flared outwardly, with its outer face sub- -itantialiy perpendicular to said :lirusto-conical lace the radius of the said flange bein substantially equal to that of the curved teeth of the rael :-bar, said flange successively engaging the opposing under sides of the teeth of the rack-bar, and means to rotate said worm-gear, substantially as described.

in a biting-jack, in combination with a verticallyanovable rack-bar, and a worm-gear engaging the same when said worm-gear is turned, astendard comprising; two separable sections lorn'led on their opposing sides with a guiigle-opening for the reception of the lower lift of said rack-bar and with casing for the reception of said worm-gear, the latter having journals projecting from its inner and outer side and the said casing being formed in its inner and outer sides with bearings for the said journals, substantially as described,

3. in a liltiilg' iach, the c nnbination of stamlarch a a revolnble wornrgear engaging said "achbar, the latter and the said worm-gear being mounted in the paid standard, and said wornr gear having an o:itwardly-projecting journal provided with a cross-pun and a lever having a hub to rotate or --t2' id projecting journal and provided in its opposite ends with notches to said crossaim and reversely-curved earns to ceaet witl; said cross-pin to successively engage said notches therewith when said lever is reversel turned and thereby rotate said worm-gear by ii. step-by-step movement, substro'itially as described.

in testimony whereof i have hereunto set my hand in presence of two subscribing witnesses.

iinNJ'. (1i. (flown vertically-niovable rack-bar, and 

